[Avid-L2] Re: Avid's Canon LogC LUT seems blown out?

 

So on a Cannon C-300 if I turn on the Cannon C-Log, which is what it is called in Avid, and I have all my camera gain settings to Unity, if that is the proper term to use, is their an equivalent ISO or EI number I could use with a light meter to tell me what F stop I should set the camera to?  As I google about EI vs. ISO and ASA of old most mention that EI comes into play when you are treating a film as something other than it's native speed.  For example one site mentions Kodak TriX non professional as an ISO or ASA of 400 but you could shoot with an EI of 250 and label the film accordingly and I assume the Lab processes it accordingly.  I interpret that to mean the film would be under exposed and the lab would know to push the film when developing, or do I have this backwards does it mean that an EI of 250 implies that the film was shot with more light/exposure as if it was a slower film of 250 rather than its' native speed of 400?

I'm beginning to embrace your "dog and pony show" but I feel there is an additional cat herding aspect in play.

---In avid-l2@yahoogroups.com, <oliverpeters@...> wrote :

As was already stated, the cameras have built in set-ups to record log, but display Rec 709. All this video village stuff is often a big dog & pony show.

When you take about EI, it's not the same as setting iris exposure. It's basically what you rate the sensitivity at, just like rating film sensitivity. Arri Alexas are set up for 800. Early RED Ones were best in the 250-320 range. Obviously that's gotten better with newer cameras, but it affects how well you see in the shadows and how much noise you get in the recording or via color correction.

LUTs tend to be a bit of a crapshoot. For example, I have yet to run across a Sony LUT that seems to look good with the new FS7 shooting in Slog2 or Slog3. If you use LUTs with that camera, the ARRI Log-C-to-REC709 LUTs give you a better starting point than anything actually design for Sony's variant. Go figure.

- Oliver

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Posted by: bigfish@pacbell.net

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